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DTSTAMP:20210916T132454Z
LOCATION:Ernesto Bertarelli
DTSTART;TZID=Europe/Stockholm:20210709T143000
DTEND;TZID=Europe/Stockholm:20210709T150000
UID:submissions.pasc-conference.org_PASC21_sess151_msa301@linklings.com
SUMMARY:Scalable and Parallel Evaluation of Tangent Operators and Gradient
s in Nonlinear Finite Element Analysis
DESCRIPTION:Minisymposium\n\nScalable and Parallel Evaluation of Tangent O
perators and Gradients in Nonlinear Finite Element Analysis\n\nLazarov\n\n
The goal of this talk is to present, discuss, and demonstrate techniques,
based on automatic differentiation, for finding the Jacobians in nonlinear
finite element analysis for time-dependent and steady-state applications,
as well as gradients for PDE constrained optimization problems. The focus
is on scalable implementation based on the MFEM discretization library. T
he idea is to utilize the standard finite element operator decomposition a
nd to apply the actual differentiation only at integration points. Such a
strategy ensures locality of the operations, generality, and computational
efficiency with negligible coding effort. Furthermore, by localizing the
code modifications to quadrature points, applications can take advantage o
f all highly optimized operator decomposition components in MFEM, develope
d as part of the Exascale Computing Project. The techniques are demonstrat
ed on several scalar and vector problems in solid and fluid mechanics.\n\n
Domain: CS and Math, Emerging Applications, Climate and Weather, Physics,
Engineering
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